Warning: require_once(DU/Application.php) [function.require-once]: failed to open stream: No such file or directory in /var/www/html/apps-prod/passwordreset/public/index.php on line 20

Fatal error: require_once() [function.require]: Failed opening required 'DU/Application.php' (include_path='.:/usr/local/zend/share/pear') in /var/www/html/apps-prod/passwordreset/public/index.php on line 20